A few years back the Umarex SA177 disappeared off the face of the earth, well not really, it simply juts stopped being made and fairly quickly retailers ran out of stock... As with anything that people want but can not get any more, the demand went up and all of a sudden everyone seemed to want to get their hand on an Umarex SA177 Blowback BB Pistol.
You might ask why Umarex stopped making what at the time was a fairly popular CO2 BB Pistol? Well if you know anything about Glock, they do not like it all that much when a company makes a product that they feel infringes upon their intellectual properties and copy writes. Did the SA177 look like a Glock, well sure it had some similarities and perhaps Glock felt it was a bit too similar and so may have kindly asked Umarex to stop making it? At least that's what I think happened :)
So that brings us to now. And a new gun on the market called the Umarex 9XP that in many ways is a lot like the SA177 but with a slightly new skin on it, one that differentiates itself a bit more from the traditional Glock look. Sure the Umarex 9XP Blowback BB Pistol has a some Glock looking properties but it am guessing it has enough subtle changes to make the lawyers over at Glock HQ happy enough to allow Umarex to again sell an airgun very similar to the SA177.
Internally and mechanically as far as I can tell the Umarex SA177 and Umarex 9XP are the same and so they should both perform very similarly too each other and with pretty much all the same specifications. Even the magazines seem to be interchangeable! The trigger and trigger pull look to be identical and even the slide catch release are modeled after each other. Again, the only difference are some minor cosmetic changes to the metal slide and polymer frame.